Pencil



Nov. 27, 1928.

F. J. VIERLING E PENCIL Filed Dec. 6, 1926 12m? f0 m Eran/f JE y Patented Nov. 27, 1928 umrEo STATES 1,693,100 PATENT OFFICE. 7

FRANK J. VIERLING AND CLOVER G. IRVINE, QF MINNEAPOLIS, MINNESOTA; SAID VIERLING ASSIGNOR TO SAID IRVINE.

rENo'rL.

Application filed December 6, 1926. Serial No.-152, 867.

Our invention relates to a pencil of the type disclosed and broadly claimed in the Frank J. Vierling application filed June 3, 1926 under Serial Number 113,450, and has for its object to provide such a pencil with means by which its lead maybe given a coarse quick predetermined step by step axial adjustment or a micrometric screw adjustment. To the above end, the invention consists of v the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indi-' cate like parts throughout the several views. Referring to the drawings:

Fig. 1 is a view of the improved pencil principally in longitudinal central section;

Fig. 2 is an elevation of the inner casing member removedfrom the outer casing member and s'howingby means of broken lines, one of the spare leads partly removed from the lead holder; I

Fig. 3 is a fragmentary detail view, with some parts sectioned, of the outer casing 1 member;

Fig.4 is a transverse section-taken. on the line 4-4. of Fig. 2; and s i Fig. 5 is a fragmentary view, with some parts sectioned, showing a slight modification of the lead holder and ejector.

Referring first to the" invention shown in Figs. 1 to 4 inclusive,the improved pencil 3 comprises a casing made up of inner and outer telescopically connected tubular members '6 and 7, respectively, and a lead-feeding stem 8 having a'sleeve-like lead holder and ejector 9 slidable thereon. *The lower end of the casing member 7 is contracted to afford a point 10 having an opening through which a lead ,w' held by the holder 9 may. be fed and guided for endwise movement in either direction.

An eraser 11 is mountedin a in the upper end of the inner casing member 6 bycircumferentially expanding the same.

A long screw thread 13 is formed in the inner end portion of the inner casing mem.

her Gby pressing the same therefrom, and" a short nut-acting screw thread or element 14 is formed in the outer casing member 7 by pressing the same therefrom, for co-operation with the screw thread 13 to adjustably connect the two casing members.

seat 12 formedv The casing members 6 is longitudinally slit at 15 from its inner end portion completely' through the screw thread 12 and it is also eircumferentially slit at-16 on each side of the slit 15. The purpose of slitting the easlng member 6 at 15 and 16 is to permit the same to yieldingly contract and expand when aXial' pressure is applied to the casing mem I bers 6 and 7 in reverse directions and there by cause the screw threads 13 and 14 to ride over each other with a ratchet-like action.

Said lead-feeding stem 8 is secured to the casing member 6 by having its upper end portion bent to form a spirally Wound section 1'7 that encircles said stem. This spirally wound section 17 of the stem 8 is forced'into said inner casing member under fsuflicient pressure to slightly contract said section 17 so as to yieldingly engage said casing member just below the seat '12 under spring action of sufiicient tension to positively secure said stem to the inner casing member 6 for common movement therewith. The spiral section 17 holds the respective end portion of the stem 8aXially aligned with the casing member 6, and it also holds said stem'against endwise movement in respect to said member for com 'mon axial and turning adjustment therewith.

' The lead holder 9 is limited in its projecting movement on the stem 8 below the lower end thereof by a pair of diagrammatically opposite lugs 8" formed on said stem, and

projecting into longitudinal slits '18 the lower end portion of said lead holder. The

'internal diameterof'. the lead holder 9 at the slit 18 is such that the same is slightly expanded when the lead as is forced therein to frictionally hold the samein the lead holder 9. The retractingmovement of the lead holder 9 on thestem 8 is limited'by a stop 19 on the stem 8 formed by flattening I from said holder by sliding saidholder upward on the stem 8 until engaged by the stop 19. v v

Formed on the upper end of the leadholder 9 is a cup 20 which has sliding engagement with the inner surface of the outer casing 7 and holds the respective portion of the stem 8 axially positioned in said casing member.

The inner casing member 6 affords a com- I is inserted into said casing.

partment for spareleads 3/ and the cup 20 affords a. bottom member for holding said leads, andis axially spaced from said member to afford a passage for said leads when filling said coi'npartment therewith, or removing one of the leads therefrom to be placed in the lead holder 9.

Obviously, the. spiral section 17 and, the cup 20 holds the stem 8 axially positioned in the casings .6'7 with the lead holder 9 axially aligned with the lead opening in the casing point 10 and against lateral movement. l Vith the lead holder 9 thus positioned the lead w is held thereby for straight line adjusting movement through the point 10'. Said lead m. is firmly held by the lead holder 9 and the point 10 during writing actionand prevents said lead from breaking.

Spare, leads 3 are inserted into the coinpartment 21 or removed therefrom, as one thereof is, indicated by broken lines in Fig.

2, when the casing member 6 is removed from the casing member 7. The lower ends of the spare leads g rest in the cup 20 and are thus held in the compartment 21 when the casing members 6 and 7 are separated.

A spring clip 22 is attached to the casing memberfi just below the seat 9 by bending the upper end portion of said clip inward and then upon itself to afford a flat prong 23 which is inserted into said casing through an aperture therein before the spiral section 17 After the prong 23 is in position in the casing member 6 the spiral section 17 of the lead-feeding stem 8 is inserted into said casing, and'presses the prong 23 against the inner wall of said casing and rigidly holds the same as shown in Fig. 1.

A coarse quick predetermined step by step axial adjustment may be given to the lead w by applying slight axial pressure to both casing members 6 and 7 in opposite directions to cause the threads 13 and 14 to ride over each other with a ratchet-like action underv the circumferential yielding movement of the casing member 6 which is permitted by the slit 15. The slits 16 permit free contracting movement of the casing member 6 at the inner end of the slit 15. The casing members'ti and 7 -may be separated or telescoped, the one within the other, by this'same relative movement of said casing members. Or a micrometric screw adjustment may be given to the lead m by the relative rotation of the casing members 6 and 7 under the action of the screw threads 13 and 14 turning the one within the other.

After the lead as is too short for further use the casing members 6 and 7 are separated and said lead ejected by giving the lead holder 9 a retracting movement on the stem8 to project said stem therethrough and force the lead 00 out of the lead holder 9.

Referring now to the invention shown n Fig. 5 the lead feeding stem 24 is provided with a single radially projecting lug 25 which extends into a slit 26 formed in the lead holder 2"? on which is formed a leacl holding cup 28. The structure shown in this'figure, is the same asthat shown in Figs. 1 and 2 with the exception that the lead-feeding stem 24; is provided with only a single lug.

What we claim is I l. A pencil comprising an Outer barrel and a shell formed of resilient material andfopen at its inner end and telescopically slidable within Said barrel but having one end extending out of said barrel, interengaging means carried by the barrel and the. shell whereby to cause advance or retract-ion of the. shell under relative rotative movement, the inner portion of said shell being provided with a longitudinal slot which. leads into th Open end of said shell, theother end of said slot terminating in a transversely extending slit formed in the body of the shell. 4

An automatic telescopic pencil, including an inner member. comprising a shell formed of resilient metaland open at its inner end, a lead arri r resiliently meunted Within said member and extending longitudinallyof said shell and beyond said open end, the inner portion of saidshell being provided witha longitudinal slot leading into said open end of the shell and termin g at the othe e d.

in a cross slot formed in the bodyof the shell, and the other end Of said shell extending beyond theend off said barrel to form .a sub stantial portion of the body ofthe, pencil and to provide gripping means, for rotating the shell with respect to the, barrel.

3. A pencil comprising an outer barrel having a spiral bead extending around the inside thereof, a s ell lescopica ly sliclahle withinsaid ba rel, s id shell being longitudinally split adjacent, one end and provided with spiral ridges thereon adapted ta resiliently engage the head on the inside of the barrel, and having; the .other'enden tending out of said barrel, the said cute/rend providing means whereby the barreland the Shell may be given. a relative endwise movement or may be relatively rotated In testimony whereof We afiix our Sl glrb tures. V

' FRANK J. .VIERLING.

CLOVER e. IRVINE. 

